Caterpillar original Diesel Engine Spare Parts Fuel Injector Nozzle 322C Excavator 198-6605 10R-0782 3126B 3126E C7 C9 Excavator Accessories Replacement for OEM 0R-9348, 10R-9348 original new injector

Sourced for B2B industrial procurement and diesel parts distribution networks, the CAT 198-6605 is a heavy-duty Hydraulic Electronic Unit Injector (HEUI) purpose-built for Caterpillar 3126-series medium-duty diesel engines. Officially classified as an Injector GP-Fuel in Caterpillar’s official parts catalog, it is designed for electronically controlled diesel fuel delivery in Caterpillar medium-duty engines. It carries a primary OE number of 198-6605 (numeric format 1986605), and is available in original, OEM-type replacement, new aftermarket and remanufactured conditions based on supply availability, for 3126, 3126B, 3126E and select C7 replacement markets.

This injector supports a range of heavy-duty equipment categories, including medium-duty trucks, marine vessels, construction machinery, excavators, industrial generators and other diesel-powered industrial assets. Cross-reference records from supplier databases link the 198-6605 to multiple compatible part numbers: 10R-0781, 197-7107, 199-6065, 222-5926, and Delphi EX630781. Note that aftermarket listings may reference 222-5966, which requires full verification before purchase to avoid fitment issues.

Exact fitment must always be confirmed via engine serial number, arrangement number, existing injector part number, injector trim/calibration code, equipment model and Caterpillar SIS or dealer database records, as configuration overlaps exist across 3126-series and C7 engine families. The part is sold as a single unit, a 6-piece set for full engine replacement, or in bulk cartons for bulk orders, serving diesel repair shops, fleet maintenance teams, engine rebuild facilities, parts distributors and marine service providers across industrial markets.